Building up the case.

It now seems much more probable that there is a third superfluid in nature, in addition to liquid 4He and the electron gas in superconductors. This is the implication of a recent report by Webb, Greytak, Johnson and Wheatley (Phys. Rev. Lell., 30, 210; 1973), the latest in a series of papers from both sides of the Atlantic which suggest with increasing certainty that a phase transition occurs in liquid 3He ncar 0.002 K. This transition is closely analogous to the superconducting transition in a meta